Recent Advances in Intelligent Coatings for Marine Antifouling Based on Self-cleaning

This review introduces the research progress of self-cleaning marine intelligent antifouling coating technology from three aspects: self-healing antifouling coating, reversible switching adhesion surface, and self-renewing dynamic surface, and its application in extending the service life of the coating and active antifouling key role in this regard. Self-healing coatings repair damaged superhydrophobic surfaces through microcapsules or reversible dynamic bonds, extending their antifouling life; reversibly switchable adhesive surfaces respond to changes in pH, stress or temperature, and perform reversible switching of hydrophilic/hydrophobic surfaces, so that pollutants Desorption: The self-renewing dynamic surface can respond to the changes of the surrounding microenvironment, such as polymer degradation, shedding, and controlled release of fungicides, which can not only reduce the attachment of fouling organisms, but also desorb the attached fouling. The modification of a membrane material with a pH sensitive surface is intriguing because an external stimulus can result in conversion between hydrophilic and hydrophobic in various pH aqueous conditions. Heat, UV irradiation, and pH are examples of external stressors that can change surface wetness. Changing the pH is the most efficient way to transform the surface from hydrophilic to hydrophobic in a short period of time. The most generally used antifoulantreleasing coatings are those based on self-polishing copolymers (SPCs), also known as acrylate copolymers having hydrolyzable pendant groups. In maritime conditions, such polymers can deteriorate by main chain cleavage, generating a self-renewing dynamic surface and improving static antifouling effectiveness. This review may potentially open new horizons toward futuristic developments in intelligent antifouling coatings for marine navigation. © 2022, Chongqing Wujiu Periodicals Press. All rights reserved.